Vitamin E and risk of age-related cataract: a meta-analysis

作者：Yu-Fei Zhang, Wenjie Jiang, Zhutian Xie, Wenlong Wu, Dongfeng Zhang · 发表于：Public Health Nutrition · 年份：2015 · DOI：10.1017/s1368980014003115 · 被引用次数：53 · 研究领域：Connexins and lens biology、Antioxidant Activity and Oxidative Stress、Retinal Diseases and Treatments

OBJECTIVE: We conducted a meta-analysis to evaluate the relationship between vitamin E and age-related cataract (ARC). DESIGN: The fixed- or random-effect model was selected based on heterogeneity. Meta-regression was used to explore potential sources of between-study heterogeneity. Publication bias was evaluated using Begg's test. The dose-response relationship was assessed by a restricted cubic spline model. SETTING: Relevant studies were identified by a search of PubMed and the Cochrane Library to May 2014, without language restrictions. SUBJECTS: Studies involved samples of people of all ages. RESULTS: Dietary vitamin E intake, dietary and supplemental vitamin E intake, and high serum tocopherol levels were significantly associated with decreased risk of ARC, the pooled relative risk was 0·73 (95% CI 0·58, 0·92), 0·86 (95% CI 0·75, 0·99) and 0·77 (95% CI 0·66, 0·91), respectively. Supplemental vitamin E intake was non-significantly associated with ARC risk (relative risk=0·92; 95% CI 0·78, 1·07). The findings from dose-response analysis showed evidence of a non-linear association between dietary vitamin E intake and ARC. The risk of ARC decreased with dietary vitamin E intake from 7 mg/d (relative risk=0·94; 95% CI 0·90, 0·97). CONCLUSIONS: The findings of the meta-analysis indicated that dietary vitamin E intake, dietary and supplemental vitamin E intake, and high level of serum tocopherol might be significantly associated with reduced ARC risk.